HVAC and tin men look no further.  This is the must have app for your trade.  Easily calculate velocity, air flow, air volume, friction loss, and duct sizing.  All calculations are real time so as you change one number the rest automatically recalculate at each key stroke.  Features include;


- full function calculator with foot/inch/fractional inch capabilities


- 100's of conversion combinations with the converter module


- real time calculations


- round and equivalent rectangular duct calculations


- any ratio of rectangular duct


- email results to workers in the field or back to the office


- imperial and metric support


- in app customer support


available platforms